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' J. F. PIERCE;

MANDREL FOR USE WITH APPARATUS FOR FORMING wees.

APPLICAHON FILED MAR. 30.191 7.

Patented Nov. 25, 1919.

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i. F. PIERCE. MANDREL FOR USE WITHYAPPARATUS FOR FORMING TUBES.

APPLlCATlON FILED MAR. 30.1917.

Patented Nov, 25, 1919.

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IINIIED stares rArnn ir oration. I

JAMES E. PIERCE, or GLYNnIoH, DELAVJARE, Assrenoa T0 AMEBIOAN vULcAnIznD FIBRE 00., or WILMINGTON, DELAWARE, A CORPORATION or DELAWARE.

MANDREL FOR USE WITH APPARATUS FOR FORMING TUBES.

raaaeae.

Specification of Letters Patent.

Patented Nov. 25, 1919.

- Application filed March 30, 1917. Sen'al No. 158,768.

To all whom it may concern:

Be it known that I, JAMES F. Plnnon, of Glynrich, in the county of NewCastle and State of Delaware, have invented certain new and usefulImprovements in Mandrels for Use with Apparatus for Forming Tubes,whereof the following is a specification, reference being had to theaccompanying drawings.

The invention relatesmore particularly to a mandrel for use in a machineof the above character, wherein the tube is wound on the mandrel,completed thereon, and after it is finishechis withdrawn therefrom.

An object of the invention is to provide a mandrel of the abovecharacter, wherein the'body portion thereof is formed in sectionsadapted to be collapsed to facilitate the withdrawing of the finishedtube. V

A further object of the invention is to provide a collapsible mandrel ofthe above character with devices wherein certain of the body sectionsmay be first withdrawntoward the center of the mandrel before-themovement of the other sections so that the last-named sections may becaused to overla Ihese and. other objects will in part be obvious andwill in part be hereinafter more fully disclosed. V

In the drawings, which show by way of illustration one embodiment of theinvention, Figure I, is a longitudinal sectional view through a mandrelhaving my improvements embodied therein, said view being on thesectional line I, I, in Fig. III.

Fig. II, is an end view of the same, showing the mandrel collapsed.

Fig. III, is a cross sectional view on the line III, III, of Fig. I.

, Fig. IV, is a view similar to Fig. I, with the parts shifted forcollapsing the mandrel.

Fig. V, is a view similar to Fig. III, with the parts shifted forcollapsing the mandrel.

- Fig. VI, is a sectional view on the line VI, VI, of Fig. III.

Fig. VII, is a detail sectional view along the line VIIVII of Fig. II,through the head and one of the supporting collars showing the adjustingscrew'for shifting the shaft relativeto'the head; 7

My mandrel is particularly adapted for forming tubes from a web offibrous material, such as paper and the like. The web is wound on themandrel and-is subsequently subjected to a rolling and heating process,

for finishing the tube, after which the tube 18 slipped from themandrel. Said mandrel consists of a central shaft and supporting headswhich are mounted on this shaft, and also body sections which aresupported by the heads andthe shaft. These body sections are sosupported that they may be moved toward the center of the mandrel andthe mandrel thereby collapsed to facilitate the withdrawing of the tubetherefrom;

Referring more in'detail to the drawings, my improved mandrel consistsof a body portion which as herein shown, is formed in foursections 1, 2,3, and 4:. At the ends of the mandrel there are supporting heads 5, and6. Extending through thesupporting heads 5, and 6, is a shaft 7.Supporting heads 5, and 6, are in the form of spiders, and eachcomprises four radial arms. Two of these armsl, 8, are shorter than theother two arms, which are indicated at 9, 9. The edgesof theibodysections 1, 2, 3, and 4, which meet directly over the arms 8, 8, arechamfered in opposite directions. as at 10, and 11. The other edges ofthe body sections which meet over the arms 9, 9, are. squared. Thesebody sections are also each provided with inwardly projecting arms 12,which are'pivoted at 13, to arms 9, 9.

Fixed to the arms 9, 9, and. extending from end. to end of the. cylinderare spacing. and supporting webs 14, which remain in fixed positionrelative to the arms. By this arrangement the heads 5, and 6, whenconsidered in conjunctionwith the fixed spacing webs 14, afford a rigidskeleton for the support of' the movable part of the mandrel. Alsoextending from end to end of the cylinder are webs 15, these webs,however, having sliding engagement with the arms 8, 8.

'Mountedcn the shaft 7 ,x are two spaced collars 16, and 17. Thecollar16, is connected by links 18, with the webs. 15, while the collar 17, isconnected by links 19, with.

. the webs 15. The collars16 ,-and 17, are se' movement of the screw.Inasmuch as the collar 17, is fixed to the shaft 7, this movement thecollar causes theshaft to be shifted endwise, andwith it the 'collar 16a A link 25, is pivoted at one end to a lug 55, on the section 1, andat the'other end to a lug 2.6, on the web 15.; A similar link 25, ispivoted to the oppositeweb 15, and the section 4-. A link 27, is pivotedto a lug 57, on the section 2, and also to a lug 28,911 the -web Asimilar link 29, is priptedito the lug 59, on the body section E3, andto the web 15. it is to be noted that in the, expanded state of themandrel, as

shown in Fig. 111, the links 27,7and 29,

are substantially perpendicular to theplane of the webs 15, while,thelinks 25, are mclined to the plane of the webs 15. The result ofthis;positioningof these links is as' follows:

As has beenexplained, the heads 5, and'G, are fixed and immovable, sothat when the shaft: 7, is moved, the webslo, cannot move*longitudinallyiwith it, b-ut'the motion of the collars f 16, a and 17,transmitted through the-links- 18,"andg19, causes the webs 15, to moveradially. inward toward the shaft 7.

Duringthis movement of the webs 15, thelinks 27, and 29, at first movethe. sec- .tions' 2, and 3,, to which they are attached very slightly,owing, to theright angle dispositionof thelinks relatlveto the' plane ofthe webs, while theJlinks ;will imme-V diately draw in the free endsoi'the body sections-1, and 4, Ztofwhi-ch they are attached, and thisinward movement of the sections 1, and 4:, causes them tobe movedbeneath {the free ends of the sections 2, and, A continuedlnwardmovement, of all i 40 the webslnltimately draws in the sections 2, and3," and their free, ends will overlap the free ends, of the 7 sections,1, and 4, as

shown :in Figs. 11, and V, in which the mandrel is collapsedand the tubeindicated at T 'isreleased, so that it may be readily;

slipped from-the mandreh --The arrangement and proportioning of thelinks referred to afi'ordsin effect a delayed motion, so that vonesection. may be withdrawn befo'rethe other. It is obvious that this.delayed motion may be; accom-- 'plished in other .ways than 'that hereinshown. I t1on.cons1'sts inthe means for collapsing the mandrel bycausing the body sections-,whieh when in place form a full' Cylinder tooverw It. is, ,therefore, obvious that minor changes. in .tlie'arrangement of the parts and the details of construction may bemadewithout departing fromthe spirit of the invention, as set forth in theappended claims.

Having thus described my invention, I claim: it

; -1. A mandrel for-tubewinding, includ- The essential ieature of theinveninp; supporting heads, a collapsible body compr1s1ng ad]acentsections supported on said heads so as to swing toward one an= other andthe center oil the mandrel, in opposite directlons w1th reierence tosald heads, t'ofcollapse the-body; and means for so swinging said heads,one in advanceof the otherjso that they shall overlap, in collapsingsaid may. r

2. A. mandrel for tube-windingmachines ineluding' oppositely webs andoppositely disposed radially movable webs, a pair or sections pivoteditoeach stationary web on opposite sides thereof, and means connecting saidpairs of sec tions to said movable-webs on opposite sides thereof,whereby one section is moved inwardly prior to'the adjacent section, sothat said sections are caused to overlap.

8, mandrel for tube-winding machines I I includinga plurality of pairsofsections forming acircular support, oppositely dis-. posed'pairs ofstationary and radially mov-V able webs, andmeans for pivotally connecting each section with .a stationary and move is movedinwardly prior tothe adjacent" section, so 'thatthe' sections are caused toll overlap, a1 n v e 3 4. A mandrel for tube winding machines, including supportingheads, body iconiposedaoi a. plurality of sections, 'meanslfoirpivotallysupportingsaid sections on said heads, movablewebsadapted tomove .radially of said heads, and means whereby, when said websare-moiedtoward the center of saidmandrel, said sections are moved inward" atadjacent-edges, one prior to the other, so thatsaid sections arecausedgto overlap.

' v5. A mandrel tortube winding'machines, 1'

including supporting; heads, a: body composed of, a plurality ofsections carried-there by, arms supporting eachg'section, saidfar'msbeing pivoted on thejsupportinp; heads, and

v disposed stationary disposed on'opposite sides offtheicenter of thehead, ,movable webs disposed adjacent the meeting edges} of] the bodysections,

means 'forfmoving saidwebs tov zard and from the center of the, mandrel,links con-j nectmg sa d webs to the movable body sections, said; linksbeing; sofc'onstructecl(and 90 able web, whereby one section ofeacjhpair 5

